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<title>FatFs - f_chmod</title>
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<div class="para">
<h2>f_chmod</h2>
<p>The f_chmod function changes the attribute of a file or directory.</p>
<pre>
FRESULT f_chmod (
  const char* <em>FileName</em>, /* Pointer to the file or directory */
  BYTE <em>Attribute</em>,       /* Attribute flags */
  BYTE <em>AttributeMask</em>    /* Attribute masks */
);
</pre>
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<div class="para">
<h4>Parameter</h4>
<dl class="par">
<dt>FileName</dt>
<dd>Pointer to the null-terminated string that specifies a <a href="filename.html">file or directory</a> to be changed</dd>
<dt>Attribute</dt>
<dd>Attribute flags to be set in one or more combination of the following flags. The specified flags are set and others are cleard.<br>
<table class="lst">
<tr><th>Attribute</th><th>Description</th></td>
<tr><td>AM_RDO</td><td>Read only</td></td>
<tr><td>AM_ARC</td><td>Archive</td></td>
<tr><td>AM_SYS</td><td>System</td></td>
<tr><td>AM_HID</td><td>Hidden</td></td>
</table>
</dd>
<dt>AttributeMask</dt>
<dd>Attribute mask that specifies which attribute is changed. The specified aattributes are set or cleard.</dd>
</dl>
</div>


<div class="para">
<h4>Return Values</h4>
<dl class="ret">
<dt>FR_OK (0)</dt>
<dd>The function succeeded.</dd>
<dt>FR_NO_FILE</dt>
<dd>Could not find the file.</dd>
<dt>FR_NO_PATH</dt>
<dd>Could not find the path.</dd>
<dt>FR_INVALID_NAME</dt>
<dd>The file name is invalid.</dd>
<dt>FR_INVALID_DRIVE</dt>
<dd>The drive number is invalid.</dd>
<dt>FR_NOT_READY</dt>
<dd>The disk drive cannot work due to no medium in the drive or any other reason.</dd>
<dt>FR_WRITE_PROTECTED</dt>
<dd>The medium is write protected.</dd>
<dt>FR_RW_ERROR</dt>
<dd>The function failed due to a disk error or an internal error.</dd>
<dt>FR_NOT_ENABLED</dt>
<dd>The logical drive has no work area.</dd>
<dt>FR_NO_FILESYSTEM</dt>
<dd>There is no valid FAT partition on the disk.</dd>
</dl>
</div>


<div class="para">
<h4>Description</h4>
<p>The f_chmod function changes the attribute of a file or directory. This function is not supported in read-only configuration and minimization level of &gt;=1.</p>
</div>


<div class="para">
<h4>Example</h4>
<pre>
    // Set read-only flag, clear archive flag and others are retained.
    f_chmod("file.txt", AR_RDO, AR_RDO | AR_ARC);
</pre>
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